کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
793743 1466602 2014 16 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
On bimodal flutter behavior of a flexible airfoil
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موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
On bimodal flutter behavior of a flexible airfoil
چکیده انگلیسی


• The flutter behavior of an elastically supported flexible airfoil is studied.
• The flexible airfoil consists of a flexible plate and a rigid airfoil-shaped leading edge.
• The theoretical model using eigenfunction expansion approach is formulated.
• A significant increase in critical flutter speed is obtained in the bimodal flutter region.
• The predicted flutter behavior of a flexible airfoil is experimentally verified.

The dynamic aeroelastic behavior of an elastically supported airfoil is studied in order to investigate the possibilities of increasing critical flutter speed by exploiting its chord-wise flexibility. The flexible airfoil concept is implemented using a rigid airfoil-shaped leading edge, and a flexible thin laminated composite plate conformally attached to its trailing edge. The flutter behavior is studied in terms of the number of laminate plies used in the composite plate for a given aeroelastic system configuration. The flutter behavior is predicted by using an eigenfunction expansion approach which is also used to design a laminated plate in order to attain superior flutter characteristics. Such an airfoil is characterized by two types of flutter responses, the classical airfoil flutter and the plate flutter. Analysis shows that a significant increase in the critical flutter speed can be achieved with high plunge and low pitch stiffness in the region where the aeroelastic system exhibits a bimodal flutter behavior, e.g., where the airfoil flutter and the plate flutter occur simultaneously. The predicted flutter behavior of a flexible airfoil is experimentally verified by conducting a series of systematic aeroelastic system configurations wind tunnel flutter campaigns. The experimental investigations provide, for each type of flutter, a measured flutter response, including the one with indicated bimodal behavior.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluids and Structures - Volume 45, February 2014, Pages 164–179
نویسندگان
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